1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fad1425d320b396d63c3cdb18478b11ea7f170d61c3f2eb2d75b3532df168e3. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/38e8699d-56a5-47ab-965a-9c76e09b840d.json and https://artists.proofprofile.net/proofs/artist/38e8699d-56a5-47ab-965a-9c76e09b840d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f0b0ce8e6fdeb527dc43e84767ccfb1b74fc76e4b1ebef965e9c26670e88f8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB339559201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59409d88e9633907a7d043f0e112646f5673fcd06fc6cd87140a89ec021c1011. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB339559202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x965ad243a0219fad11231a010e5763374c0819ff81d1d9fdc0dd56df1bc004c4. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB339559203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b2577eb2eaec89b5c349c3b6a770297488c6d5f2d654014ce2c505424a74d7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELW71731905.
7 Magnificat Antiphons: No. 5. O Morgenstern
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce186f3190d51237cae69fffed3dfc7cb62bd95a2392066dbd0ed5fa10a48ec4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELW71731908.
Palestrina: Il primo libro de madrigali a 5: Stanze sopra la Vergine: No. 1, Vergine bella
Palestrina - Twilight of the Italian Renaissance
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d398cdb18c66854c6689404c3674ceb0c9e0d83ebb0a6ddb2a7a0b335d24190. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8401313.
Palestrina: Il primo libro de madrigali a 5: Stanze sopra la Vergine: No. 3, Vergine pura
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c07a4d507e84651b2d04eede30c051ea7a1c6c3ac2e6b01502c556c4f3e29b. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8401315.
Palestrina: Il primo libro de madrigali a 5: Stanze sopra la Vergine: No. 7, Vergine quante lagrime
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f008b3388c6fbb6066cea5c20f71f58bbf4bf400a574274a2efd895649c9c3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8401319.
Palestrina: Il primo libro de madrigali a 5: Stanze sopra la Vergine: No. 8, Vergine tale è terra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa827d87022ba5b47dd1c29232005457612b707c3173fa7d67732571416b84986. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8401320.
Palestrina: Il primo libro de madrigali a 5: Stanze sopra la Vergine: No. 2, Vergine saggia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53543d9691d453212f25f5323429fc4cab1be17abab5ca189547664f34382fc3. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8401314.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Palestrina: Il primo libro de madrigali a 5: Stanze sopra la Vergine: No. 4, Vergine santa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc567e14133a898f82c28705a135b6a21eb6b328cff17988fe524b0b3c48648ed. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8401316.
Palestrina: Il primo libro de madrigali a 5: Stanze sopra la Vergine: No. 5, Vergine sola
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x442446f39047b9fffa2c9a8277f15ccf017e6956ad68c2ff4799c2fd50e0f257. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8401317.
Palestrina: Il primo libro de madrigali a 5: Stanze sopra la Vergine: No. 6, Vergine chiara
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293a69585560898d6dbfee590f2844e570538ebad1cf6ca320a480472c510fb3. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8401318.
Mater ora filium (Sacred Music in 14th-c. England): Mater ora filium (Sacred Music in 14th-c. England)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bdb092050db46ae5c376acb972bbae4f553b691bde16262fb6ded022cc0e49c. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ148409130.
Anchor che col partire (Italian Madrigal): Anchor che col partire (Italian Madrigal)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c522542ceed273b5cba947e589e43465561849b1ace90b2dd5f9f5b820eedf. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ148216130.